Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Malware Delivery Domain (invoicetrycloudflare .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".invoicetrycloudflare.com"; endswith; fast_pattern; reference:url,twitter.com/karol_paciorek/status/1791056351843500196; classtype:trojan-activity; sid:2052739; rev:1; metadata:created_at 2024_05_17, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_05_17, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)